fix opensearch mapper_parsing_exception

[fly2F]

karmada-search error log: Could not dynamically add mapping for field [app.name]. Existing mapping for [metadata.labels.app] must be of type object but found [text].

Co-authored-by: liys87x [email protected] Signed-off-by: huntsman_ly [email protected]

What type of PR is this? /kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes: Fixes #2335

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[fly2F]

Example of mapper_parsing_exception error generated under dynamic mapping

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: nginx
  name: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx:alpine
        name: nginx

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app.name: nginx1
  name: nginx1
spec:
  replicas: 3
  selector:
    matchLabels:
      app.name: nginx1
  template:
    metadata:
      labels:
        app.name: nginx1
    spec:
      containers:
      - image: nginx:alpine
        name: nginx1

[wuyingjun-lucky]

/cc @wuyingjun-lucky Can you help take a look and have a test?

OK, I will finish it this weekend. /assign

[wuyingjun-lucky]

I have tested it works well on my side @XiShanYongYe-Chang. I am not sure whether it will have an effect on query actions like labelselector if we change flattened to object and set it to false although it seems we have not implement query actions on opensearch backend.
Leave it to you @liys87x @RainbowMango @XiShanYongYe-Chang.

[fly2F]

opensearch does not support flattened https://github.com/opensearch-project/OpenSearch/issues/1018

[wuyingjun-lucky]

opensearch does not support flattened opensearch-project/OpenSearch#1018

OK looks good to me cc @XiShanYongYe-Chang

[XiShanYongYe-Chang]

@wuyingjun-lucky Thanks a lot!

[karmada-bot]

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